Breeding for Spring calving herds is due to kick off in the next few weeks. With that in mind we take a look at heat detection and pre-breeding checks before the season gets started. <\/p>\n\n\n\n\n\n\n\n
Heat or Oestrus refers to the period of time whereby the female exhibits significant behavioural changes and displays mating receptivity. Oestradiol, produced by the dominant follicle, is the primary signaller to the hypothalamus in the brain to induce behavioural oestrus, in the presence of low levels of Progesterone. The primary sign of oestrus in the cow is referred to as standing heat whereby the cow stands to be mounted by other animals in the herd or by a bull.<\/p>\n\n\n\n
However, research has suggested that not all cows display standing heat, commonly referred to as silent bullers or cows who have silent heats.
As not all cows that go on to ovulate display standing heat, accurate oestrus detection can be difficult. However, there are many secondary characteristics of heat behaviour that cows display when under the influence of oestradiol and oestrus behaviour expression. The following are the main signs of heat in cows:<\/p>\n\n\n\n
To get a better idea of a cows reproductive status, many farmers opt to carry out a pre-breeding scan on cows. A pre-breeding scan is ideal for confirming uterine involution has occurred and cows have returned to their pre-pregnancy uterine state. Dairy Cows should return to cyclicity from about 42 days post calving, whereas beef cows will cycle later if they have a calf at foot from about 55 days on. Cows that require attention will also be highlighted during this scan. For example anoestrous or non cycling cows as well as cows currently suffering from uterine infection. In heifers, it can identify animals who have immature ovaries who may not be suitable for breeding. The scan will also identify where the cow is in her cycle so you will have a better idea if she will come into heat soon. This is also useful to know if you plan to synchronise animals, which will be covered in a later post.\u00a0<\/p>\n\n\n\n
<\/p>\n\n\n\n
It is important to identify\u00a0potential issues so that they can be addressed correctly before the beginning of breeding.\u00a0<\/p>\n\n\n\n
For example, anoestrous cows (non-cyclers) are often not picked up until they have not been submitted for AI. This can be up to 3 weeks. It will be harder to identify non-cyclers if a bull is running with the dairy herd or with sucklers and these cows are often missed. If a cow is experiencing an issue returning to cyclicity, there are many drug protocols available. But in order to identify the correct protocol required a scan is recommended. For example, an anoestrous cow has no functional corpus luteum therefore drugs like prostaglandins will have no effect and a full progestogen based protocol is a better option based on veterinary advice. Other issues can include cystic ovaries which will also need intervention. <\/p>\n\n\n\n
For sucklers, having a suckling calf at foot can have an effect on the fertility status of the dam due to the calf-dam bond. A way around this is to limit suckling to morning and evenings. Alternatively, a progestogen protocol can be used to restore fertility in most cases> Again speak with your veterinary practitioner to find the right protocol for your herd. <\/p>\n\n\n\n
Body Condition Scoring (BCS) is a technique used to assess how thin or fat a cow is on a scale of 1 to 5, where 1 is extremely thin and 5 is extremely fat.<\/p>\n\n\n\n
The incorrect BCS can have an adverse effect on the different stages of pregnancy. For example, if BCS is too high there can be issues at calving such as dystocia as well as increased risk of milk fever. On the other hand, a cow that is too thin can have trouble cycling or holding a pregnancy. Additionally, too low BCS can result in a reduction in milk supply. Dairy cows should be at a target BCS of 3 at mating. <\/p>\n\n\n\n
For sucklers, 2.5 is the generally recommended BCS at breeding. <\/p>\n\n\n\n
![\"Untitled](\"https:\/\/2865975.fs1.hubspotusercontent-na1.net\/hubfs\/2865975\/Untitled%20design%20(6)-3.png\")
<\/h2>\n\n\n\nHeat detection can be carried out in a number of ways. <\/p>\n\n\n\n
![\"PGP_0602_1TomHerdCows-1\"](\"https:\/\/2865975.fs1.hubspotusercontent-na1.net\/hubfs\/2865975\/PGP_0602_1TomHerdCows-1.jpg\")
Another way to identify issue cows is to record pre-breeding heats. The absence of such can indicate a cow is not cycling. Ideally for best conception rates cows should be bulled from the second heat onwards for early calvers. Recording first heats allows enough time for uterine involution, this is not always practical for late calving animals as in order to keep tight calving patterns, so at least 30 days after calving should be observed before breeding. <\/p>\n\n\n\n
If you record a heat observation in Herdwatch you will receive a push notification in 21 days time letting you know that the cow should be in heat today.<\/span> You will see a list of females in heat on your Watchboard. This gives you the best chance to get your cows back in calf as soon as possible.<\/p>\n\n\n\n >Tap Breeding When the animal(s) is due, you will receive a push notification and she will appear in the Watchboard<\/i><\/strong> under Heat Due Today<\/strong>. So you know to keep a closer eye on her!<\/p>\n\n\n\n The Watchboard will remind you which cows are due to repeat to ones that may be on heat based on the information your record.<\/strong>When heat observations<\/a> or serves<\/a> are recorded into Herdwatch, the app will remember the dates and use the Watchboard to remind you when they are due to repeat. Herdwatch will send you a daily push notification when you have events on your Watchboard that needs attention. <\/p>\n\n\n\n The Watchboard covers two main are for breeding records:<\/p>\n\n\n\n The power of having this information in the Watchboard is that it will send you a daily reminder (in the morning) that there’s cows due to repeat or due to be bullying so you never miss a chance to get your cows in calf again!<\/p>\n\n\n\n Breeding for Spring calving herds is due to kick off in the next few weeks. With that in mind we take a look at\u00a0 heat detection and pre-breeding checks\u00a0 before the season gets started.<\/p>\n","protected":false},"author":1,"featured_media":7888,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","footnotes":""},"categories":[355],"tags":[146,153],"location":[239],"class_list":["post-7887","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-farming-operations","tag-ireland","tag-latest-news","location-general"],"acf":[],"yoast_head":"\nHeat observations can be recorded easily by following these steps…<\/h2>\n\n\n\n
>Tap the Orange Plus Button (+)<\/strong> in the bottom right hand corner
> Tap Heat Observation<\/strong>
> Set your reminder in days<\/strong>
>Set the number of cycles you want to be reminded for (i.e.21 or 42 days)
> Tap Next<\/strong>
> Select the animal in heat<\/strong>
> Tap Save<\/strong><\/p>\n\n\n\n\n
You too can join over 18,000 other happy farmers saving time on farm paperwork and managing their farms more efficiently by downloading the Herdwatch app today.<\/h3>\n","protected":false},"excerpt":{"rendered":"