This is not an issue of aggression, he is trying to mate with her. When a male cat mounts a female, he will get on top of her and try to bite at the back of her neck ("subdue her"). You should get both cats fixed. If he is having territorial disputes, you may try the product "feliway". This is a harmless pheromone that produces the same chemicals that a cat does when "happy". It will help the cats feel at ease, and this will allow them to feel more comfortable around each other, if it is indeed an agrression issue. Be sure to spray around the house, not on the cat!
i am not a vet but i think any dog can have different things than it is most likely have.
You need a really good immigration lawyer. Normally a person found guilty of a felony would not be allowed to stay in the United States. Still, the fact that you pleaded No Contest in exchange for time served could be in your favor. A good immigration lawyer could possibly use that fact before an immigration judge.
Currently the average beef cow will weigh 1200-1400 pounds when ready to be marketed - the weight has dropped slightly due to recent surges in corn prices (a major component of feed in feedlots) and the drought in Texas that is drying out pasture lands.A mature beef cow kept for breeding can weight up 1700 pounds, more if she is in late pregnancy.Average beef cattle weigh in around 1600 lbs. But this all depends on the breed, as some breeds will often weigh more than others.