Eyes will begin opening now and vision will become clearer as the weeks go on. Hearing is developing as well. Still staying near its mother, the Beagle puppy will begin to move around, perhaps venturing away just a bit. In most cases, at this point, the pup is not barking. Some will make whimpering and/or whispering sounds. Human touching should increase, to allow the 3 week old Beagle to slowly become accustomed to human touch and voice.
What a big change ! The 4 week old Beagle is now vocal and wants to explore the world. An extra box can be added onto the whelping box to make a "play room" for the litter. Littermates are now playing with each other, learning important socialization skills. The most important one is the act of biting. When a pup "play bites" another pup, it will be the sharp "Yelp" that lets the puppy know that they bit too hard.
While still receiving nutrition from the dam, weaning will slowly begin. The pup will receive mom's milk but also begin eating a soupy mixture that perhaps the pup for a day (not long from now) when he or she is independent.
Human socialization is very important beginning at this age and on. If the pup will be going to a new home, it is at this age up until 8 weeks that the owner should be preparing the puppy to become used to normal household noises, having its paws touched, gently being held, etc.
The first de-worming should be done.
Exploration and curiosity is ruling the Beagle puppy's daily life right now. Tired of the whelping box, the pup wants to explore the home. Care must be taken to puppy-proof all rooms that the Beagle pup has access to. The weaning stage is almost done, as the pup's main source of nutrition is watered down puppy food. In many cases, the entire litter may be paper trained (although outside training should begin at 8 weeks old). The pup should be responding to its name and socialized to all touching and normal household noises (such as the doorbell, TV, washing machine sounds, etc.)
At 6 weeks, the 2nd de-worming should be done.