Wearing a taweez

Q: Is it permissible to wear taweez for children and adults? Ayat ul kursi, the quls.

And for babies the dua: Aoothoo bi Kalima til la hit ta mah ti min kuli shay taanin wa haa ma tin wa min kulli ay nin la mah tin.

Also is it permissible to wear a necklace for women with ayaat ul kursi engraved on it?

If it is permissible, I know the necklace has to be removed before entering the toilet area. But the taweez being covered in a cloth, will it also have to be remove?

Following the rules and regulations of a company one works for

Q: Is there any rules and regulations about not working according to an organization's standards?

For example, I work in an organization and my job is to give bonus amount to others based on their work. There is a chart by the organization about how much bonus should be provided according to the work. But if I don't follow it and give a bonus not according to them, will it be ok or not?

Euthanasia for an old dog

Q: A dog is in its old age, and is also very sick. Due to this sickness, the dog groans and cries in immense pain. He struggles to walk so he lives on pain meds. The owners love the dog, he is no trouble at all.

Is it permissible to put him down (euthanasia) due to his ongoing suffering?