Tennis Balls

I have been told to refrains from using tennis balls in excess.   Hanna is totally ball motivates so we switched her out to Orbee balls - I did however find someone else who posed a question and a great response with a lot of backup site to support.  Thought I would pass it along

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( Q ) I have read several places on this a site  that makes reference to a study showing that tennis ball glue eats dogs tooth enamel. I have been unable to find a copy of this study and would like to share it with the local dog trainer and pet store as they have both asked to see it if i can get my hands on it. Can you direct me to where i can get a copy of this study? Many Thanks

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( A )

QUOTE: ... owners should avoid the use of tennis balls for chewing as these are very abrasive and cause significant teeth wear. END from http://www.NewmanVeterinary.com/DentalProblems.html

QUOTE: Discourage playing with tennis balls as the "fuzz" on the tennis ball is very damaging to your pet's enamel. END from
http://www.LakesVet.net/programs/dental.htm

QUOTE: Another concern about tennis balls - particularly with those obsessed with them - is that the coating on real tennis balls that allows them to stand up to the pounding of a tennis game is very abrasive to the enamel of a dog's teeth. For the occasional toss-fetch game it's probably not an issue, but over a lifetime for a dog who lives with a tennis ball in his mouth, you could have significant dental issues down the road. END from
http://www.dogwise.com

and, from

Picture of abraded teeth, caption, on DentalVet.com:
QUOTE: Abrasion - a pathologic wearing away of dental tooth surface by friction of a foreign material. Examples: tennis balls .... END from http://www.dentalvet.com

and QUOTE: Speaking of tennis balls, as a quick aside, they are actually a problem for dogs in that the coating that makes them tough on the court is very wearing on the enamel of teeth. This isn't a big problem for dogs who occasionally chase a ball, but with a ball crazy dog, it could present a significant health problem down the line - they may want to switch to handballs, Kong balls, or some other kind of ball that is not damaging to enamel.END from http://www.dogwise.com/forums/messagevi ... eadid=2596

Other sites say the glue is an additional problem..... so, all in all, pretty convincing. And of course tennis ball choking deaths are warned of on just about every vet med site.