You may note that he was called sally!
Well practically any of the outdoor ones. Any make. The devil is however in the details.
Take the salsa I just bought. That chair is typical in that it can be ordered in 101 different variations. And the details matter.
For stability, you would need to order it without the lift/tilt/footrest/recline etc. Because it makes it too top heavy and unstable and it lacks the required regidity. So that makes buying one hard, or requires that some modifications are done.
You dont want any of the 2 pole options, and the common eBay 4 mph ones are too slow with a dog. The 6mph 4 pole motors needed for torque outdoors are uncommon since it $$$costs, and likewise you will want the biggest 120A controller not the 70 or 90A versions. And again off road on grass and trails eats batteries so not the 60Ah options but the 80Ah one. Same with rear wheels and tyres, they offer thin rims and tyres and slightly heavier larger pneumatic tyres. And you want the largest front tyres at 10 inches as they are wider and more balloon like so dont sink as easily or get caught in the grass.
Then it really needs a centre footplate so you can move the seat back to get the weight off the front casters to aid their floatation when you find a soft patch of ground. This applies to almost every rear drive, and even to some front drive chairs. So you cant just like go on eBay and choose a salsa. Even theough theres loads. Details make all the difference. So with the CORRECT options!
As long as the correct options are available, and a little DIY with some spanners can be done to get the basic C.G and setup right, and programming, then there are options.
Front drive isnt my choice but you cant fall out of the rear as easily and the climb well.
https://www.sunrisemedical.co.uk/powere ... sedeo-ergoMid drive wont do. Tiny casters, and less traction means you get hung up in long grass as already mentioned.
https://www.sunrisemedical.co.uk/powere ... irs/q700-mThis replaces the salsa that you will find used all over. And my chair.
https://www.sunrisemedical.co.uk/powere ... sedeo-ergo its basically the same thing, with front suspension. You would have to deselect all the seating options, and select all the correct power/wheel options.
This is a cheaper version.
https://www.sunrisemedical.co.uk/powere ... -sedeo-pro BUT NOT SURE if the correct options are available, you may need a custom build. Like centre footrest etc.
https://www.sunrisemedical.co.uk/powere ... -sedeo-pro Again check options!!
https://www.sunrisemedical.co.uk/powere ... hairs/alex not the short wheelbase one, and again select correct options. Also come up used.
Thats just the sunrise med site.
https://www.invacare.co.uk/invacare-kit ... ma-50kiten not sure what ooptions this has or allows but if you want to reprogram it avoid the linx control system, and 2 pole motors.
But for OUTDOOR use I would buy an X5/V6 either their rear drive or mid because their bigger longer platform means stability.
Even used ifyou have some mechanical setup/configuration ability.
https://www.ebay.co.uk/itm/MAGIC-MOBILI ... Swd2Zb0iR-Then theres this:
viewtopic.php?f=2&t=5624The point being that its not really about any specific chair. But the options, and configuration and programming.