I bought two new cockateil from store. This is the first time buying cockateil don't know their gender. The shopkepper said that they are pair but i don't think soo as they sit together but sometime the yellow one kick the grey one and they don't let the other one come near the food if one's is eating. Sometime they sreech alot too. Also the yellow one pluck it feather and i can see his skin Don't what is wrong with them. They are getting food on time. Don't eat veggie even if I give them. How can I take care of them