Wheelchair for dog walking

[PhoenixIsFlying]

Hi, I just wanted to ask your advice.
My mum lives with me and my daughter, she has Alzheimers and limited mobility.
During the week, mum goes to daycare so I can walk the dogs.
At the weekend, I take mum in the wheelchair for the dog walk.
The wheelchair we currently have has small hard non inflatable wheels. It's not ideal.
I am looking at sourcing a second hand wheelchair from somewhere. Can anyone recommend the type I should go for , for rough terrain.

Thanks in advance

Those small wheeled chairs are ok for transfers but not for out door adventures. You need a large wheeled self propelling chair. That's what my mum had even though she didn't propel it herself. It was fine for shopping trips and paved paths but no good on sand or long grass.

Thank you @IthinkIsawahairbrushbackthere that is good to know. I'm finding pushing mum in the current one very hard going.