I doubt very many people have had to face one since it's a Forge World model in the Monstrous Arcanum, but... The Toad Dragon can only be wounded by S4 or higher and, regardless of strength, it can never be wounded by a roll less than a 3+. My Skinks are packing poison. S3 Javelins and Blowpipes, possibly S3 poisoned attacks in CC. Can I hurt it with unbuffed Skinks? Does it's ability to shrug off low strength attacks preclude poisoned attacks?
Poison essentially ignores the strength of the attack, so I would say the Toad Dragon can be wounded by it. There isn't a to wound roll either, so the no better then 3+ doesn't preclude poison.
Yah, the Saurus could attack it no problem. Just gotta worry about the 2D6 super Thunderstomp. Sounds like a solid argument to me. Poison wounds regardless of toughness or strength. Thanks for the input.