Translation:Sometimes I give bread to the five birds.
The written text says חמש but the verbal says חמשת. Which one is gramatically correct?
He is not saying khameshet. What you are hearing as "et" is the beginning of the next word hatsiporim, with the h weak enough that you are hearing the next two letters.
Bread is generally treated as a collective noun in English. If you wanted to specify a unit you could say "a loaf of bread", or "a slice of" or "a piece of" but normally would not say "a bread".