Some of the scholars said that if water (pus) from wounds is a small amount, it does not break wudu, but if it is a large amount then it does break wudu.

You can catch Friday prayer up with one rak`ah. If you catch up with the second rak`ah prayed with the imam, then you can pray it as Jumu`ah. If you catch up with a person who is making up the rak`ah that he missed and pray with him, then you should pray it as Zhuhr and not as Jumu`ah.

Ostrich meat is halal because Allah has blessed His slaves by subjugating to them that which is in the heavens and on earth. For more about haram animal meat in Islam, see the detailed answer.