I don't see how using a harness would harm the patellas in any way. There is no way a leg problem could be worse than collapsed trachea. CT interferes with breathing and strains the heart and lungs.
My boys have used harnesses for 4 - 5 years and they have healthy legs.
__________________ Kristin, Max and Teddy
Last edited by Maximo; 05-09-2013 at 10:50 PM.
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