Hi Patrick
This is normal behavior as the cygnet will get stronger as it begins regular feeding, swimming and climbing banks. Then, the cygnet will reach the “ugly duckling” stage where its body size looks disproportionate to its legs. The cygnet will once again go through a resting phase as it’s wings are not yet developed to counterbalance it’s weight over developing leg structures. Both of these are normal growth stages. As long as the parents wait for him and continue to guard and care for him, all is well. The Regal Swan