nebraskadave
Active member
- Joined
- Jan 18, 2007
- Messages
- 30
Just curious what the going rate for AI'ing is. Had a guy ask me what it would cost to hire someone to AI his heifers. Whats everyone charging or paying out there?
nebraskadave said:Just curious what the going rate for AI'ing is. Had a guy ask me what it would cost to hire someone to AI his heifers. Whats everyone charging or paying out there?
:lol: feed him bread and cheese.Emma said:What's a "gomer" bull and how do you plug a bull?
Red Robin said::lol: feed him bread and cheese.Emma said:What's a "gomer" bull and how do you plug a bull?
Detector Animals
Detector animals (teaser animals) can be used to help producers determine estrus. A commonly used detector animal is the surgically altered gomer bull. It offers an accurate, natural method of estrous detection. When bulls undergo castration, they become steers and lose their sexual drive. Altering bulls by vasectomy, penile deviation or both can be used to prevent bulls from successfully breeding without performing castration.
Since gomer bulls are used to detect heat and not for breeding purposes, selection criteria should focus on bulls that won't become excessively large in size and weight and those that have good dispositions. Vasectomized gomer bulls are still capable of penetrating a cow's reproductive tract; therefore, for heat detection purposes, they should be home-raised or obtained from a herd free of diseases. In order to prevent the spread of diseases from bulls purchased from an auction market (unknown source), they should be penile-deviated. Although penile-deviated bulls are manipulated to prevent copulation, in some cases they may successfully complete intromission. Therefore, if penile-deviated bulls are used, they may need to have a vasectomy to ensure that pregnancy does not occur.
Androgenized cows, heifers (freemartins) and steers can also be used to help producers detect estrus. Teaser animals developed through this method are generally easier to handle than a gomer bull. A veterinarian must treat this type of detector animal, since procedures involved in this process are federally regulated due to drug withdrawal time. Response to treatment varies from animal to animal, so you will need to include alternative methods of heat detection to ensure maximum success.
Chin-Ball Marker
Detector animals are usually fitted with a marking device such as a chin-ball marker (Figure 1). When a detector animal mounts and begins to slide off and the chin rubs the back of the female, the chin-ball marker is activated and marks the back and rump of the mounted cow. Although chin-ball markers are very useful, maintenance is necessary for continuous use. Straps made of leather may break or stretch, leading to the loss or misplacement of the marker in the pasture. They must be checked periodically (every few days depending on activity) and refilled with paint.
Figure 1. Vasectomized gomer bull with chin-ball marker.
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Using chin-ball markers will allow 24-hour estrous detection. Maintaining heat records twice daily will allow an observer to determine when cattle have been active during unobserved times. Reading the markings may take some experience to accurately determine heat. Markings located around the rump or tailhead area indicate that estrus behavior has occurred. Other markings may be the result of chin resting. Careful evaluation will enable the observer to accurately determine if the primary sign of heat has occurred in cattle that had previously displayed secondary signs of heat.
Hereford76 said:Well I guess I don't know how they got the name "gomer" - but a gomer bull is just a bull used to help heat detect. This guy used chin ball markers on the bulls and it helped for the hours we weren't there heat detecting. I had heard of some unique ways of making a gomer bull - but this guy took about a six inch chunk of 3/4 inch pvc, capped it off one end, and drilled a pin hole through the side of it. He ran the end without the cap up the bulls sheath and then drove a pin through the bulls sheath, through the hole in the pvc and he had a gomer bull. I didn't get to see how eager those bulls were to breed after we left - I would have to imagine they were a little sore.
I was curious to know if anyone reconized that ranch.