https://www.vetsurgeon.org/f/clinical-questions/13168/ageing-of-puppy-by-teeth I had a young chihuahua puppy brought in to me yesterday. The new owners had been messed around by the breeder - first being told the puppy was 8 wks old, then that his DOB was 7th Sept, then that it was sometime in August. When I saw him yesterday,en-USTelligent Community 10https://www.vetsurgeon.org/thread/75266?ContentTypeID=1Fri, 19 Oct 2012 14:12:47 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:1f253bbc-9db6-4bec-8d4b-285e913f196dEvelyn Barbour-Hill<p>[quote user=&quot;Sarah Warner&quot;] I&#39;m guessing he&#39;s 6 weeks maximum[/quote]</p> <p>Sounds a good estimate when you put it together with your other observations, but the trouble is that delayed eruption is not uncommon in tiny dogs.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/75260?ContentTypeID=1Fri, 19 Oct 2012 13:10:15 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:94aa0fd6-80bd-44ca-9cbf-012e7b965a5aTim Cheyne<p>I do not believe that there is a reliable <i>precise</i>&nbsp;method of aging by tooth eruption at such an early age, there are too many variables involved, but this might help.</p> <p><a target='_blank' target="_blank" href="http://tinyurl.com/8c4qgor"><span>http://tinyurl.com/8c4qgor</span></a></p> <p><span>Tim.</span></p><div style="clear:both;"></div>