If you do end up deciding to neuter, I would call around to shelters/rescues that accept rabbits and see if any of them can recommend a good low-cost neutering option – “a few hundred dollars” sounds awfully high for a neuter (I paid around $465 for two spays and neutering is usually a good bit cheaper).
Spaying is incredibly important because of females’ proclivity towards reproductive cancers; however, any potential health benefits of neutering males are negligible at best, so intolerable hormonal behaviors and/or wanting to bond them to another rabbit are really the only reasons you’d *need* to neuter a male. Fair warning, they can potentially spray pee six feet into the air (and many males like to aim for faces), so you might want to be ready to book him for neutering in the event his spraying escalates
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In this particular situation, I suspect the air freshener is probably to blame. If the new smell is what set the spraying off, then it’s entirely possible that it won’t continue. Failing that, from what I’ve heard, once they reach the one-year-old mark, most unaltered rabbits’ hormonal behaviors tend to die down quite a bit. If he’s freshly hormonal (3-6 mos range), then there’s a decent chance the behavior will escalate… however, if he’s closer to a year old, the chances are good of hormonal behaviors remaining minimal for him
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