The cows had younger calves who had started sucking milk from their mothers, and some of the cows had newly given birth, but now, because of love, the cows enthusiastically showed their affection for the older calves, which had left off milking

Expressions researched:
"The cows had younger calves who had started sucking milk from their mothers, and some of the cows had newly given birth, but now, because of love, the cows enthusiastically showed their affection for the older calves, which had left off milking"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

The cows had younger calves who had started sucking milk from their mothers, and some of the cows had newly given birth, but now, because of love, the cows enthusiastically showed their affection for the older calves, which had left off milking. These calves were grown up, but still the mothers wanted to feed them. Therefore Balarāma was a little surprised, and He wanted to inquire from Kṛṣṇa about the reason for their behavior.

SB 10.13.35, Translation and Purport

Because of an increase of affection, the cows had constant attachment even to those calves that were grown up and had stopped sucking milk from their mothers. When Baladeva saw this attachment, He was unable to understand the reason for it, and thus He began to consider as follows.

The cows had younger calves who had started sucking milk from their mothers, and some of the cows had newly given birth, but now, because of love, the cows enthusiastically showed their affection for the older calves, which had left off milking. These calves were grown up, but still the mothers wanted to feed them. Therefore Balarāma was a little surprised, and He wanted to inquire from Kṛṣṇa about the reason for their behavior. The mothers were actually more anxious to feed the older calves, although the new calves were present, because the older calves were expansions of Kṛṣṇa. These surprising events were taking place by the manipulation of yogamāyā. There are two māyās working under the direction of Kṛṣṇa-mahāmāyā, the energy of the material world, and yogamāyā, the energy of the spiritual world. These uncommon events were taking place because of the influence of yogamāyā. From the very day on which Brahmā stole the calves and boys, yogamāyā acted in such a way that the residents of Vṛndāvana, including even Lord Balarāma, could not understand how yogamāyā was working and causing such uncommon things to happen. But as yogamāyā gradually acted, Balarāma in particular was able to understand what was happening, and therefore He inquired from Kṛṣṇa.