Plecos empty cave in!!!?

I have 10 common goldfish and a clown pleco in a 10 gallon tank with a piece of drift wood 3 life plants and 2 plastic plants airstone, heater and of course a filter.. The pleco doesn't seem to be like eating.. The stomach is cave inwards.. It looks like its starving.. I throw in pleco wafers but the goldfish seems to eat that too,flakes and pellets to make sure my pleco gets a bite but it seems like only my goldfish is getting bloated