As soon as the testicles have desended I believe, which happens around 6 months, or earlier, I think. However, unless a female is in heat she cannot get pregnant. Females generally have their first heat between 6 & 12 months of age though. So a 5 & 7 month old pair is very risky. That is plenty old enough to get spayed & neutered even for the most conservative vet or owner.
A sirloin roast of 8- to 12-lbs will take 16-20 minutes for rare, 20-22 for medium rare, 23-25 for medium, and 26-30 for well done. A boneless top round, by contrast, will take 28-30 minutes for rare, 30-33 for medium rare, 34-38 for medium, and 40-45 for well done.If you roast at 325Â°F (160Â°C), subtract 2 minutes or so per pound. If the roast is refrigerated just before going into the oven, add 2 or 3 minutes per pound.ow long and at what temperature should I cook a beef roast in the oven? Roasting is a great cooking method for a large, tender cut of beef  such as a rib or sirloin roast.
You can make an Eye of Round roast very easily. This takes just a couple of ingredients. An eye of round roast, salt, pepper, and olive oil. You don't need to marinade your roast ahead of time, simply let the oven do the cooking. The approximate cook time for this roast at 350 degrees is 30 minutes per pound.ou can make an Eye of Round roast very easily. This takes just a couple of ingredients. An eye of round roast, salt, pepper, and olive oil. You don't need to marinade your roast ahead of time, simply let the oven do the cooking. The approximate cook time for this roast at 350 degrees is 30 minutes per pound.