I don't know if you can buy a heart rate monitor for dog's very likely we didn't look, just checked heart rate for 15 seconds then multiplied ×4 same for femoral pulse which is harder to check but does tell you his heart is pumping blood fairly efficiently, we had long spells with King behaving like he was a fully fit dobie then would just crash and wouldn't be interested in anything apart from sleeping, if his stomach starts to get upset canned pumpkin can work wonders just a serving spoon on top off the meal, we also changed to feeding King four times a day we found smaller meals didn't overwhelm his tummy, hopefully the medication will have positive effects on your poor boy and he can have longer with you than what your told by the vet's, I'm sure you will make his remaining life the very best possible
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