sorry abax, I disagree. I worked for a vet & I had a dog obedience business for 25 years. Chew hooves can cause problems, proceed with caution. Sterilized, hmmm ...... any animal that spends it's life time in a cattle lot wading in manure waiting to be slaughtered, really how sterilized are they going to be? You also didn't mention how the dogs' breath smells and especially when they lick you! Pretty disgusting! If it doesn't smell like crap then I want to know what's being used on them to eliminate the smell?What happens when they've ingested too big of a piece? They're either heaving it up, sometimes working overtime or it gets out of the stomach but causes a blockage in the intestines = instant expensive surgery! Not worth the potential dangers IMO. Put a chew hoove in a glass of water, a few hours later what's it like? 12 hours later? 24 ? Guess what it won't change no matter how long it's left. Put the rawhide in a glass of water, same scenario, it will change, if it's soft they have a better chance of passing it. Are you sure it's not the combination of trying to digest dog food plus the rawride that globs up their intestines? I'm not a fan of rawhide either, American made or nothing is the way to go. Very harsh chemicals are used on the hides to remove the hair & the residuals are not worth the chance.
Why are dogs chewers? Because they're bored & don't get enough EXERCISE, they need their butts run off. If physical exercise can't be provided daily how about mental exercises? In all my years of training & owning dogs, tired dogs don't get into mischief, they don't need half the stuff owners give them to chew on and by the time they get thru adolescences you have a well trained dog!