So, about two months ago my mare had a brain malfunction and threw me. I still have no clue why she did that. Zero signs before and after. No scary stuff happening - and she isnít a spooky horse in any case. I am guessing she just forgot for a millisecond it was me up there and was mightily confused when she saw me on the ground. Or she collected and stepped on her tail
I know you haven't asked about this, but just an opinion that might help you clutch appropriate straws & avoid in future... First, no, I don't believe your mare 'forgot' you, unless there was some trauma from her past you triggered somehow. Unless you were going backwards I can't see how your horse could step on her tail. So if there were truly no 'mental' causes, I'd suspect physical - eg. 'kissing spine' can be something that can cause strong, sporadic or 'out of the blue' sudden pain.
My question is - as I have to travel for work soon, and I will be away for a month - do I let the young instructor ride her while Iím away? My mare puts weight on easily and needs the excersise.
So, if the horse has 'reverted', she is obviously not enjoying the 'work' she's been made to do by this girl, regardless of how good a rider she may be. As she has already started this 'habit' again with you, you already have something that needs to be worked on, to get her enjoying herself more. Depending on how long you're away for work, etc, will have a bearing on how much more she may become 'set' in her attitude about 'work'. There is also the question of physical probs causing the buck 2 months back, that perhaps she has 'reverted' to this behaviour to tell you she is not happy, because she's hurting, but too well trained to 'tell' you in other ways.
So... IF it were definitely only 'behavioural' then I think it's up to you - that she may become more 'set in her ways' with more experience with this girl, but if she's learned stuff can be fun with you in the past, it probably won't take much more work to get her over it. But if you haven't ruled out physical probs, then *I* wouldn't ride her again until doing so, let alone let anyone else ride her.
As for her 'putting on weight easily', either feed her less, if she's simply getting too much, or put her on lower sugar/energy hay. Regular exercise is important for any animal however, and if she is locked up or otherwise unable or unmotivated to move much where she's kept, I'd look at changing that if at all possible, get her accommodated in a healthier environment. Or if not possible, she should be getting regular unridden exercise anyway, such as taking her on a few energetic walks per day. You could always employ the girl to do that instead of riding.
Would it be rude to leave a lesson plan? This girl is a semi-pro, and I am a rank amateur. ... I am paying for the rides.
Yeah, I do think it could possibly go down the wrong way & offend, if you're not careful how you put it, but at the end of the day... the last bit you said above. And the horse has(whether caused by this girl or not) developed a problem, so I would indeed speak to her about it. Whether it is behavioural in that she is just making it all 'work' & not enjoyable & she can focus on more fun for the horse, or whether it's a physical issue and she shouldn't ride her.... I personally wouldn't want it to go on in the same way if it were my horse.
Or do I just let the mare have a break? That could potentially introduce more difficult issues and I have no idea how she reacts to breaks in riding.
Aside from putting on weight/getting unfit, simply not riding will not 'introduce more issues'. The reason people have probs with horses after they've had a 'spell' is either that they have been 'shut down' with regular domineering riding, so they may get a bit of 'spirit' back after a break & feel that they can tell you what they think of it all - due to past 'breaking in' trauma or whatever. Or they have some discomfort/pain that they have been 'shut down' to through training & regular riding. If those things are issues, you may well have probs coming back in, but it's not due to new issues. If those things aren't an issue, &/or you're considerate to listen to your horse & respect her feelings, your horse shouldn't be any different with you if you rode her yesterday or last year.