Stingrays chewing on others tails

Should my stingrays chewing on the other rays in the tanks tail be an issue to be concerned about.. They aren't chewed up that bad but enough to be noticable. I want to take care of the issue before there is a chance to get out of hand. If I need to seperate I will but if this isn't that big of a deal I'll just let them be. They get enought food everyday to keep them satisfied. I have two females and one male. Any thoughts?

Trevor

Ive got two motoros one big female, one mature male and another motoro hybrid female(her tail is the one the is getting chewed up) She is the same size as the male and the male has been trying to breed both of them for awhile now. I feed them heavy each day of the week (one feeding).. I feed them enough until they are no longer hungry, I put a bunch of food in the aquarium and wait for about an hour and then take out the remaining. Shrimps, scalops, worms, pellets... I do weekly water changes. I think I might try to get a plexi glass piece and try to seperate the male from the females.. If everyone agrees that this is an issue that needs to be taking care of. If my feedings don't seem like enough let me know thanks.

Trevor

I watch them eat each feeding they have.. everyone gets enough, like I said I leave the food in there for about 30 mins to 45 mins and then scoop out the remaining.. But feeding them twice a day sounds benificial. Im going to try to seperate them for a little bit.

Trevor