My mother has a (I am going to say 7 year old) large male dog that last year was unable to naturally control flea infestations. This leads me to believe that it very probably was unable to control internal parasites as well; so I have been suggesting that a heartworm test might be a good idea.
But I understand that they highly recommend 30 days crate rest if they have adult heartworms and they take the medicine to kill them.
Which leads me to my question. If the dog is not going to be locked or tied up for any notable time, would it be safer to just not worry about the heartworms? Is it advisable to administer adult heartworm medication when the crate rest is impossible? And if it is not, is there any reason to even test for the presence of them?
Some additional information: I see no problem with keeping his average exercise to practically nothing. He is big and old enough that he does not run around for fun. But in a months time their will certainly be some wild animal he will decide to kill, some cattle who escape, or just someone visit or drive by with dogs barking in the back. Their will be some 2 minute time interval where he goes full out.