Thank you all for your comments.
MaggieLynn, this is my second Betta, the first past away a few weeks ago from a virus. During his sickness I bought a lot of stuff to try to heal him, but it was to late. Through this process I learned and found out a lot about Bettas. My new Betta is very happy and has a lot of appetite (I'm not over feeding by the way) and I crush his/her food so that it is easy to swallow.
One more question, how old do you think my Betta is? He/she is less than an inch long (0.75-0.9).