You can mix the Kaytee baby bird feed with Pedialyte instead of water if you like. The easiest way to hold a mature pea when tube feeding is to kneel over the bird as in Kathy's turkey video, pinning it right between your legs, hold the syringe in your mouth to insert the tube and once the tube is in the crop use that hand to squeeze the plunger or hold the syringe and push with your chin.