This involves bulls inseminating the cows or more commonly non-consensual artificial insemination

Animals aren't capable of consenting to anything. They lack both the communication capabilities and the mental facilities to make the kind of decisions that are involved in any kind of consent. This is similar to how the severely mentally disabled are unable to consent and must instead have a caretaker give medical consent.

I'll concede that animal farming practices are generally difficult to justify and align with our modern morals, but farm animals can and often are treated with a level of respect to quality of life that is not far from some pets, just with the added expectation that they also provide for us.