You could try it, but first I would just go down during the day ~ preferably in the afternoon and watch to see if they are flying. There should be foragers coming and going as long as it is not raining. If there is no activity you should check inside. Unless it is very warm and the hive is in full sun ~ bees tend to be late risers and early to bed.
Even if there is activity you could still take a quick look inside if you want too. Just open the lid and take a look ~ you should be able to see the bees without taking out any frames or disturbing them too much.
What type of feeder jar are you using? If it is a front entrance feeder ~ they are not supposed to drip. They have very small holes that the bees put their proboscis into and suck out the syrup. They can get clogged with dried sugar though.
Even if there is activity you could still take a quick look inside if you want too. Just open the lid and take a look ~ you should be able to see the bees without taking out any frames or disturbing them too much.
What type of feeder jar are you using? If it is a front entrance feeder ~ they are not supposed to drip. They have very small holes that the bees put their proboscis into and suck out the syrup. They can get clogged with dried sugar though.