Study: It may be easier to teach middle-aged dogs new tricks
Dogs' personalities change as they age, and they are more responsive to training in middle age than they are as puppies, rese -More-
source https://www.smartbrief.com/branded/D5B61895-8343-46AE-9E8D-69BF8059ECA6/D1E11817-E555-4FB7-8F16-613AF6FCF87E
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