I have a 2 yr old Redbone Coonhound / Boxer (we think) mix. She has lots of chew toys (nylon based) and we also have been buying her rawhides w/ beef flavoring on them from ipets.com. However she won't chew the nylon toys for any more than 10-20 min and give it up. Are there any kinds of sprays that I can buy to spray on the nylon toys to entice her? She is a bit neglected by our 14mo child.