It can certainly be a hard choice. I do believe that wild animals should be free and with their own kind. There will always be instances when we have the opportunity to rescue and help them. For those instances, my opinion may differ. I would rescue any hurt, ailing, or lost animal if it were in my abilities to do so

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You've done a great job! See, it's the others that continually bring in wild animals, that I feel are not doing them a favor. If we all took in wild frogs, numbers would decline, and many would die due to improper housing, leading to illness. They would miss their opportunity to breed within their species, producing more little toads. You have taken the time to educate yourself, have kept him/her safe, and have given a nice home

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Though I do feel we should not take from nature, this is often a tough subject that can sometimes vary depending on circumstance.