Interesting topic!! LOVE IT.
When we were standing our first Shetland stallion we did a combo of live, hand cover and pasture breeding (the smaller Shetland and Hackney mare). When I bred the mares in the AM, I found I got fillies and when I tracked it and bred in the PM, we got colts. We didn't ultra sound, so don't know exactly when each mare was ovulating. Had one mare that was bred every other day for 21 days in a row - he got darned tired of her and would "hide" in the corner of his pen when he saw me coming w/ his breeding halter and she was out. We DID get her in foal (amazingly) - and she foaled a colt! He was actively covering other mares at the time (hand breeding). OUt of 32 foals - 19 were fillies and 13 were colts. The most recent were all stud colts. Before he was injured (and subsequently euthanized), he covered a mare in May - one good cover and one...soso. This will be his last foal and we don't know for sure that the mare is preggers yet. She was covered around 10:30 am - both times.
He sired all fillies (5) when bred to our one Hackney mare. She produced one filly and one colt by 2 other stallions. She was handbred after foaling on her heat cycles but also ran in the pasture with him several times.
He sired 3 fillies and 2 colts out of another mare that he was bred to. Don't know when mare bred for the first filly (surprise pasture breeding in MT before moving to NC - right after losing her 1/2 arab colt at birth)... Others - know that first colt for us was produced from PM breeding - not sure on the rest...Notes disappeared when computer crashed and didn't have info printed or online (saved). Sired one colt and one filly out of another horse mare we owned. Ditto the notes, tho.
He sired two fillies out of an arab mare bred in AM only. Sired two colts out of two other Arab mares when bred in PM only. Sired a filly out of an outside mare bred both am and pm on different days...
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"New" stallion - first year no mare bred to him settled. Was pretty worried about it - hand bred 4 mares to him live cover. VERY shy breeder! So far, he's sired 5 fillies and 3 colts for us. BUT I don't know for sure if they have been just AM covers or not as I often turned the mares back out with him after actual hand breeding was done... 1 stud colt was a complete surprise this spring - as the mare was with him (13.1 hands to his 10 hands) and was not hand covered using the raised ramp that used in the two previous years' breedings - guess it was jsut a matter of figuring things out, LOL. She doesn't usually squat very low - figured that she must have laid down for him. DID NOT put her out with him again this spring after she foaled. They do miss each other, tho, constantly talking to each other even when not in heat. Want to sell the mare - get down to all purebred Shetlands.
The two sibling colts look to make a matched pair in height and movement - should mature around 12.2 hh and will make a very fancy driving pair!!! or single riding/driving ponies.
AFter originally not wanting to breed too many mares this past spring, I bred way too many!! Not sure who is and isn't in foal yet. Most were bred in AM hand breeding but then again, turned the mares out with him forup to 3 weeks after the last hand cover. One little shetland mare is still running with him - she came back into season after originally bred and I turned her out with him... Believe she is in foal now, but am/pm??... We'll see what happens.