the short answer
Pawgen is a vial-first research peptide brand with a large content library. Old Dog Longevity is a pen-first brand built around the daily routine. Both sell BPC-157 + TB-500 for dogs as research-use products. The choice is format and routine, not a cure.
| Pawgen | Old Dog Longevity | |
|---|---|---|
| Flagship | K9-REPAIR | The Dog Peptide Pen |
| Format | Vial + BAC water + syringe | Dual-chamber pen |
| Routine | Reconstitute, draw, inject | Twist, shake, click a day |
| Dose | Units by weight | Clicks by weight sticker |
| Price | From $80/pack | $119/28 days |
| Guarantee | 60 days | 90 days |
| Content | Very large condition/breed library | Focused condition/comparison library |
| Status | Research-use; not FDA-approved | Research-use; not FDA-approved |
Choose Pawgen if
You want a vial, you are comfortable with reconstitution, and you value a very large library of condition and breed pages.
Choose Old Dog Longevity if
You want the simplest possible daily routine, a weight-based click instead of unit math, and a pen that lives on the counter instead of a vial in the fridge.
What neither product is
Neither is an FDA-approved drug, a cure, or a surgery substitute. Neither replaces veterinary diagnosis or pain control.
Questions owners ask
Which is cheaper?
Pawgen’s headline pack price is lower, but the honest comparison is cost per 28 days for your dog’s weight. The Dog Peptide Pen is $119 per 28-day pen.
Which is easier?
The pen: no reconstitution, no syringe, no unit math.
Which is more established?
Pawgen has a larger content footprint. Old Dog Longevity is newer and focused on the pen routine.