A few more:

A possible solution for this issue could be using computer models for testing new kinds of drugs

As a matter of fact (your statement is NOT a matter of FACT, you need to rephrase), using animals for such non-critical purposes is shameful ("shameful" is stylistically bad, try "morally wrong") [s:222806q9]for humankind[/s:222806q9] and should be banned

Another very important aspect of this issue is the fact that recent inventions in the area_ of genetic engineering can [may?] (I'd say might) lead to using animals for transplant surgery

Therefore it is reasonable to seek advice from a general practitioner about whether (awkward) your family is at risk having a pet. Try:...from a general practitioner about the risks to your family from owning a pet.

a lot of money for expensive haircuts, clothes or even delicious food for their pets == even is very strange here... does it not make more sense to spend money on dog food than on clothes?

it is a real nightmare_ for my family as well as [s:222806q9]our[/s:222806q9] for our neighbours