[LilFarmer]

I have been making my dog’s heartworm meds for about 15 years using the 1% cattle injectable. I had my farm vet double check my numbers to make sure my recipe yields the same percentages as heartguard and such.

The recipe is 30ml propylene glycol to 1ml 1% ivermectin. Mix well and refrigerate.

I use a 1 ml syringe and give orally:
6 to 12 pounds: 0.1 ml
13 to 24 pounds: 0.2 ml
25 to 36 pounds: 0.3 ml
37 to 48 pounds: 0.4 ml
49 to 60 pounds: 0.5 ml
62 to 72 pounds: 0.6 ml
73 to 84 pounds: 0.7 ml
85 to 97 pounds: 0.8 ml
98 to 109 pounds: 0.9 ml
110 to 121 pounds: 1 ml

You can also use vegetable oil instead of PG, but it does not keep as well.

Every so often my vet will still run a heartworm check, but we have had no issues. Just remember that the same warnings for heartguard apply - can cause seizures in certain breeds.

[SheepWhisperer]

Perfect!
My Pyr is 92# and guessed at .9mph (1% administered orally)

Thank you for the information

[Melinda in TN]

Thanks! Dogs here have to be checked annually for HW.