feeding

Q: On the day of the wedding (Nikah), the bride's father will offer food for all the guests who visited the wedding at that time. The guests will be from both sides and that might be in large number i.e. 1000.

My question is, will the food offered by the bride's father to the grooms side haraam?

Q: Is it right that i throw meat every day in garden for sadka for birds and they eat every day.

Q: I read if a Muslim feeds a pious person, he gets the reward of the pious person's actions for 40 days. Is this a Saheeh hadith? What is the reference and is it suitable to quote?