I have been noticing every time I pick up my boy kitten his mouth makes a shape of a "meow" but there is no sound coming out of him. Is this something I need to worry about? Also his mouth is open often and a little bit of his tongue is sticking out. He is growing, drinks his mom's milk really good. But with him not meowing and crying, with him having his mouth open a little concerns me. Is this something I need to have the vet check out??