Conducting tests on animals

Q: I am a medical scientist working in a research facility. Our work is to develop new medications and treatments for various diseases.

When we need to test a certain medication to see its effectiveness, side effects, etc, we use lab rats as our test specimens. We first infect the rat with the disease and then inject it with the medication to see the result. In some cases, other animals are used as well.

Recently, this began to bother me, as I realised that we are abusing and harming these creatures. However, we have to test the medications on some subject, and we obviously cannot do so on people. What should we do?

Cutting off ties with one's daughter who lives as a non-Muslim

Q: My daughter left our home 4 years ago to live with her father who is a murtad. This was done without my knowledge or consent. Subsequently the step mother had been raising her and introduced her to a Christisian lifestyle. We tried to prevent this and get her to move back home where we are Muslim. The law enforcement informed me that I would be charged with kidnapping if I was to remove her from their house as she was already 18 years old.

Throughout these 4 years she has lived the life of a Christian and has tattoos on her body. I have chosen to not be in contact with her as she refused to change her ways as she was raised in a Muslim household. I have 3 younger children and feel that my attention should be with them.

Recently I was informed that she had fallen pregnant by a Christian guy who she lives with and subsequently the baby has died.

My family are now blaming me even though I've tried my outmost to make her understand that the lifestyle and choices she made is against our religion. Certain family members are going behind my back to support her even though they know she is living as a Christian.

Can I have advice on this matter as my other kids are suffering because of all the stress this child has brought to my family.

Saying the word "sana" and "durood" before reciting sana and durood in salaah

Q:

1. Zaid said the word sana before reciting the complete subhanakalluhamma wabihamdika... in salah, is the salah valid?

2. Zaid said the word Durood Ebrahim before reciting the whole Durood Ebrahim in salah, is the salah valid?

3. Zaid said the word dua before reciting the whole dua in salah, is the salah valid?