Concerns not of treifa but of sakanas nefoshos and the signs that an animal is kosher

Two ways to learn ameimars statement about the first batch of eggs from a treifa being asur,the life span of gnats and flys,tubes that connect from on stomach to another when they are kosher

Shmutas yerech machlokes kosher or treifa and Reb shimon Ben chalafta and his experiments 

What's a treifa and what's kosher when it comes to a bird

Rav nachmans shita that ad bchlal or vlo ad bchlal always lchumrah,nikev hatchul and luksa kulya,and when gluda is not a treifa

Where a bedika on a derusa is don,machlokes about a dislodged ball of the thigh and why we stand up for people bringing bikurim

Various halachos about derusah and when to be concerned it's a treifa 

Where a bedika on a derusa is don,machlokes about a dislodged ball of the thigh and why we stand up for people bringing bikurim

When to be concerned about risuk aivrim by a bird,ravs Halacha about a treifa when an animal is missing part of a vertberate,and is there derusah from a cat

When you find a needle that has blood the animal is definelty treifa and when to be concerned about risuk eivarim