You're kinda like the Indians that say "thank you" to each species before they eat it!
Nope...I never thank an animal..they have no part in if they are consumed or not, nor do they selflessly sacrifice themselves for my nourishment. I thank the One who created the animal, provided it for my food and also gave me the health and money to care for them. I do this also, in deed, by being a good steward of the animals He entrusted to me. I take that very seriously and I raise chickens as if for the Lord Himself.