Very confused. Have a 4 month old black lab and I thought the rule re exercise was 5 minutes per month of age twice a day. So 4 x 5 minutes = 20 minutes twice a day so 20 minutes in the morning and 20 in the afternoon.
However a friend has told me it's 20 minutes TOTAL and should be 10 minutes in morning and 10 in afternoon. Googled it and people are saying both things - can someone tell me definitively, don't want to hurt our girl. Thanks.