Putting a dog down

Q: Is it permissible to put down an aged and ailing dog. We have a dog who have lost his eyesight due to old age. His health is deteriorating gradually. The vet has advised to put him down. Is this permissible?

What qualities should one look for in the person one wishes to get married to

Q: I am a girl of 33 years old and not yet married. I always get many marriage proposals and I have never accept anyone. If I would get married tomorrow that is easy but the problem is that most of people are experiment people, means that unfortunately they have done many things before marriage and that is for me not possible to marry someone like that. I feel we are so different, but today it is very difficult to find that person, even impossible. I am lost, I don't know what should I do. I am afraid that after marriage I feel bad living with this person. Could you please advices me and share with me your valuable opinion.