Must have already started to biodegrade!
Well, I don't know for certain, but it would appear that these bags had already begun to degrade before they were even used!
First of all, being able to separate the bags was almost an impossibility, then when separated, it was next to impossible to open individual bags, & when one did begin to open them, the bags split down their middle, leaving one to pick up dog poo with two halves of a bag (wouldn't recommend that to anyone, as it's rather a hit or miss experience to put it mildly!)